Chasing the digital dream.

The Interactive Advertising Bureau reports that revenues for digital advertising in the U.S. for the first half of 2017 rose 23% from the year before, to an all-time high of over $40 billion. Digital audio advertising was up 42% year-to-year, reaching just over $600 million. Mobile stays on top with 54% of all digital revenues. Video, meanwhile, was up 36%.